CN103237532B

CN103237532B - Comprise the body fluid absorbent article of body liquid absorptive core and manufacture the method for this core

Info

Publication number: CN103237532B
Application number: CN201180057483.3A
Authority: CN
Inventors: 向井敬智; 阿良山贵也
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2010-12-28
Filing date: 2011-12-28
Publication date: 2015-11-25
Anticipated expiration: 2031-12-28
Also published as: US20130289509A1; US9107779B2; AU2011353422B2; WO2012090508A1; JP5783719B2; CN103237532A; AU2011353422A1; EP2658496A4; JP2012139381A; EP2658496B1; AR084640A1; TWI574674B; EP2658496A1; TW201225939A

Abstract

The invention provides a kind of improvement to absorb the body fluid absorbent article of body fluid rapidly, and manufacture the method for core being used for body fluid absorbent article.Body liquid absorptive core (40) due to body fluid absorbent article is formed with one or more rectangular depression (43).Described core (40) comprises one or more surface layer (105) and is positioned at one or more interior section (105) of inside of one or more surface layer (105).One or more surface layer (105) is formed primarily of liquidabsorbing fibres, and one or more interior section (106) is formed by liquidabsorbing fibres and superabsorbent polymer granule.

Description

Comprise the body fluid absorbent article of body liquid absorptive core and manufacture the method for this core

Technical field

The present invention relates to each include the body fluid absorbent article of body liquid absorptive core and manufacture the method for this core, more particularly, relate to be suitable for be used as the body fluid absorbent article of diaper, toilet training trousers, Briefs for incontinence patients or menopad and the body liquid absorptive core for this body fluid absorbent article.

Background technology

Each diaper all with the body liquid absorptive core comprising body fluid absorbency fiber and superabsorbent polymer granule is known.Such as, JP3208289B(patent documentation 1) disclose a kind of diaper, described diaper has longitudinal direction, horizontal direction and thickness direction, and comprises the core be clipped between liquid-permeable sheet and opaque liquid sheet.Core in this diaper is formed with slit, and described slit extends from its surface in the face of the skin of wearer to it back to the surface of the skin of wearer in a thickness direction throughly.These slits extend in a longitudinal direction.

In this diaper, such as urine waits body fluid to flow along described slit, thus body fluid dispersion is in a longitudinal direction accelerated.

Citing document

Patent documentation

Patent documentation 1:JP3208289B

Summary of the invention

Technical task

In diaper disclosed in patent documentation 1, the perisporium through each slit of core includes a large amount of superabsorbent polymer granules, and described superabsorbent polymer granule tends to when absorbing body fluid form gel piece.This gel piece meeting plugged slots, and finally can destroy the required function of described slit or prevent body fluid from being absorbed rapidly by the perisporium of each slit.

Solve the scheme of problem

In in first of the present invention, provide a kind of body fluid absorbent article including body liquid absorptive core.

More particularly, in article according to a first aspect of the invention, described core has predetermined thickness, and its inside includes liquidabsorbing fibres and superabsorbent polymer granule, and is coated with liquid-permeable sheet on the upper surface of this core.

In this body fluid absorbent article, described core has in the face of the surface of skin and the non-surface in the face of skin contrary in the face of the surface of skin with this; At least one surface in the surface of skin and the non-surface in the face of skin be formed from the face of the surface of skin to non-one or more rectangular depression sunk in the face of the surface of skin; And, this core comprises the one or more surface layers formed by liquidabsorbing fibres respectively, to limit the perisporium of described one or more rectangular depression, and this core also comprises interior section, described interior section is positioned at the inner side of described one or more surface layer and is formed by the liquidabsorbing fibres mixed and superabsorbent polymer granule.

In second of the present invention, provide a kind of method manufacturing body liquid absorptive core.

For the manufacture of in the method for this core, technique for the manufacture of this core comprises: step liquidabsorbing fibres being supplied to each mould, described mould has the recessed region of the 3D shape corresponding to this core respectively, wherein, this recessed region limited by bottom with from the perisporium holded up bottom this; Each perisporium of described mould is formed with multiple through hole at least in part, and one or more the female region can be subject to swabbing action via described through hole; In this fiber supply step, under the swabbing action provided via through hole, each surface of described perisporium is covered by liquidabsorbing fibres at least in part.

The useful effect of invention

In body fluid absorbent article according to the present invention, the surface layer limiting the perisporium of the one or more rectangular depression of the body liquid absorptive core for these article is formed primarily of liquidabsorbing fibres.By the structure of this uniqueness, for these surface layers, can prevent the superabsorbent polymer granule be included in interior section from moving in core and invade rectangular depression, wherein, in the depression that one or more is rectangular, superabsorbent polymer granule can absorb body fluid and form gel piece.Like this, body fluid can be absorbed by the perisporium of one or more rectangular depression for this body liquid absorptive core.

Accompanying drawing explanation

Fig. 1 is the perspective view of the disposable diaper of an example as body fluid absorbent article according to certain embodiments of the present invention.

Fig. 2 is the plane graph of the partly cut-away of diaper from the open and flat Fig. 1 opened of the state shown in Fig. 1.

Fig. 3 is the plane graph of the partly cut-away of the substrate of the diaper of Fig. 1.

Fig. 4 is the plane graph of the partly cut-away of the body liquid absorptive sheet of the diaper of Fig. 1.

Fig. 5 is the sectional view of the diaper intercepted along the V-V line of Fig. 4.

Fig. 6 is the enlarged drawing of the encircled in Fig. 5.

Fig. 7 is the plane graph of the core represented in Fig. 4.

Fig. 8 is the fragmentary, perspective view of a part for the technique of the core of the diaper illustrated for the manufacture of Fig. 1.

Fig. 9 is a part for the technique for the manufacture of core.

Figure 10 (a) is the fragmentary, perspective view of the first going barrel, and Figure 10 (b) is the sectional view intercepted along the Xb-Xb of Figure 10 (a), and Figure 10 (c) is the enlarged drawing of the encircled portion Xc in Figure 10 (b).

Figure 11 is the plane graph of the core according to an exemplary embodiment of the present invention.

Figure 12 is the plane graph that the mode that the core of Figure 11 is actually used exemplarily is described.

Figure 13 is the sectional view of the core intercepted along the XIII-XIII line of Figure 12.

Figure 14 is the figure of the mode of the core distortion that Figure 13 is exemplarily described.

Figure 15 is the figure of the technique of the core illustrated for the manufacture of Figure 11.

Figure 16 is the plane graph being similar to Figure 11, represents the core of embodiment according to another preferred.

Figure 17 is the sectional view intercepted along the XVII-XVII line of Figure 16.

Figure 18 is the plane graph of the core similar with Figure 11, represents another one embodiment again.

Figure 19 is the sectional view of the core intercepted along the XIX-XIX line of Figure 18.

Detailed description of the invention

The details of body fluid absorbent article according to the embodiment of the present invention will be understood more completely from the description for the Breeches type disposable diaper as an exemplary with reference to accompanying drawing.

In the drawings, X and Y represents mutually orthogonal horizontal direction about the diaper 10 of Fig. 1 and longitudinal direction.Line P-P is by the binary longitudinal centre line of width dimensions on the horizontal direction X of diaper 10, and line Q-Q is by the binary cross central line of width dimensions on the longitudinal direction Y of diaper 10.

With reference to Fig. 1, diaper 10 is provided with substrate 11, the crotch area 14 that described substrate 11 comprises front waist area 12, rear waist area 13 and extends on longitudinal direction Y between front waist area 12 and rear waist area 13, makes the shape that substrate 11 can be made into about longitudinal centre line P-P symmetry.

Substrate 11 by respectively in horizontal direction X in the front and back waist area 12,13 extend front and rear end 15F, 15R sketch out profile, and by lateral margin 16R, 16L of subtend limit.Front and rear waist area 12,13 is connected via crotch area 14.Substrate 11 also comprises the waistline opening 11a limited by front and rear waist area 12, the 13 and a pair leg opening 11b limited by front waist area 12, rear waist area 13 and crotch area 14.Along lateral margin 16R, 16L of subtend, on longitudinal direction Y, compartment of terrain configures multiple seam 17.

In fig. 2, the diaper 10 of expansion is in such state: the front and rear waist area 12,13 of the diaper 10 of Fig. 1 is peeled off mutually at seam 17 place, is then launched on horizontal direction X and longitudinal direction Y by diaper 10.The diaper 10 launched is represented as the state observed from the inner surface side of diaper 10.The inner surface side of diaper 10 refer to when diaper 10 by through on the health of wearer time in the face of the surface of the skin of wearer, in the following description, the surface in the face of skin will be referred to as.

With reference to Fig. 2, the body liquid absorptive sheet 40 that diaper 10 comprises substrate 11 and is installed on the inner surface of substrate 11.Substrate 11 has the aduncate concavity of crotch area 14.Body liquid absorptive sheet 40 is crossed crotch area 14 and is extended into front waist area 12 and rear waist area 13, and the sidepiece along its subtend on horizontal direction X is provided with liner flange 40a.Sheet 40 has and absorbs and the effect of receiving body fluids in the region that it is limited between liner flange 40a.

In figure 3, sheet 40 is represented by imaginary line.Substrate 11 has aduncate concavity, and comprises: limit the internal sheets 25 of the part on the surface in the face of skin of diaper 10, front waist area 12 hot-melt adhesive (not shown) is from the external engagement of diaper 10 to internal sheets 25 before outer plate 26F and at rear waist area 13 hot-melt adhesive (not shown) from the external engagement of diaper 10 to the rear outer plate 26R internal sheets 25.Front and rear end 15F, 15R respectively along diaper 10 of front outer plate 26F and rear outer plate 26R is folded, makes opposite end 18F, the 18R of covering internal sheet 25 as observed in the longitudinal direction Y in figure 3 of the inside from diaper 10.

The front waist area 12 of substrate 11 comprises multiple anterior first waistline elastic component 30, multiple anterior second waistline elastic components 31 and multiple anterior leg elastic member 34.Anterior first waistline elastic component 30 and anterior second waistline elastic component 31 extend along horizontal direction X between the subtend lateral margin of front waist area 12, and be configured between internal sheets 25 and front outer plate 26F, and be fixed under the state of tensioning at least one in these sheets 25,26F by hot-melt adhesive (not shown).

The rear waist area 13 of substrate 11 comprises multiple rear portions first elastic component 32 and multiple rear portion second elastic component 33.Rear portion first elastic component 32 and rear portion second elastic component 33 extend along horizontal direction X between the subtend lateral margin of rear waist area 13, and be configured between internal sheets 25 and rear outer plate 26R, and be fixed at least one in these sheets 25,26R by hot-melt adhesive (not shown) under the state of tensioning.

Rear portion leg elastic member 35 is positioned at crotch area 14, and is configured between internal sheets 25 and rear outer plate 26R.The sidepiece 35b of the subtend of these rear portion leg elastic member 35 extends (see Fig. 1) along the part of the periphery limiting each leg opening 11b respectively and intersects sideling with longitudinal centre line P-P.Pars intermedia 35a and the longitudinal centre line P-P of rear portion leg elastic member 35 extend across crotch area 14 orthogonally.These rear portion leg elastic member 35 are also fixed at least one in internal sheets 25 and rear outer plate 26R by hot-melt adhesive (not shown) under the state of tensioning.

In such substrate 11, internal sheets 25 can by from comprising, one or more materials of choosing in the group of the adhesive-bonded fabric of thermoplastic synthetic fiber, plastic foil, adhesive-bonded fabric-plastic membranous layer compound are formed.Preferably, as the material of sheet, adopt opaque liquid sheet, more preferably, adopt and breathe freely and opaque liquid sheet.One of typical example of internal sheets 25 is that the SMS(spun-bonded/melt-blown of polypropylene fibre is spunbond) adhesive-bonded fabric.

Front outer plate 26F and rear outer plate 26R is preferably formed by the adhesive-bonded fabric of the such thermoplastic synthetic fiber of such as spunbond adhesive-bonded fabric, the sticky adhesive-bonded fabric of point or SMS adhesive-bonded fabric, thus the outer surface of substrate 11 can provide the sensation skin of wearer being similar to cloth.One of typical example of front outer plate 26F and rear outer plate 26R has to be about 17g/m ²the polypropylene spun-bonded adhesive-bonded fabric of gross (that is, the quality of unit are).

As anterior first and second waistline elastic components 30,31, anterior leg elastic member 34, rear portion first and second waistline elastic component 32,33 and rear portion leg elastic member 35, except such as Spandex(TM) except the bar of such synthetic rubber or natural rubber or band, also can adopt can the adhesive-bonded fabric of elastic elongation or the strap of polyurethane rubber.Assuming that the diaper 10 of Fig. 1 is adult diaper, Spandex(TM is used) as elastic component, each all can be had about 700 to 4 to 8 elastic components of the fineness within the scope of about 1200dtex being used as anterior first waistline elastic component 30 and rear portion first waistline elastic component 33 by under with the state of the extensibility tensioning in the scope of about 2.0 to 4.0, further, 7 to 20 elastic components of each fineness all had within the scope of about 400dtex to about 1200dtex can be used under the state be tensioned with the extensibility in the scope of about 1.4 to about 4.0.Under same supposition, each all can be had 2 to 6 elastic components of about 400dtex to the fineness within the scope of about 1000dtex being used as anterior leg elastic member 34 under with the state of the extensibility tensioning in the scope of 0 to about 3.5, and each all can be had about 400dtex to the fineness within the scope of about 1000dtex 2 to 6 elastic components by under with the state of the extensibility tensioning in the scope of 0 to about 1.8 as the pars intermedia 35a extending across crotch area 14, and each is all had 2 to 6 elastic components of about 400dtex to the fineness within the scope of about 1000dtex by the sidepiece 35b being used as under with the state of the extensibility tensioning in the scope of about 2.0 to about 2.5 to extend across sideling with longitudinal centre line P-P.The extensibility of the pars intermedia 35a of the rear portion leg elastic member 35 orthogonal with longitudinal centre line P-P can be set lower than the extensibility of each sidepiece 35b, so that the shape of each the rectangular depression 43R on the absorbability sheet 40 that will describe after preventing from being formed near longitudinal centre line P-P, 43L is subject to the impact of pars intermedia 35a.Can the extensibility of sidepiece 35b be set relatively high, to guarantee that absorbability sheet 40 is pulled into (see figure 4) near its subtend lateral margin 16R, 16L on longitudinal direction Y, thus, prevent when diaper 10 by through on the health of wearer time absorbability sheet 40 at horizontal direction X superior displacement.

In the diagram, substrate 1 represents with imaginary line.Sheet 40 comprises liquid permeability people side liner 20, opaque liquid back sheet 22 and is configured in the body liquid absorptive core 42 between these two parts 20,22, and, along the liner flange 40a that two sidepieces of mutual subtend extend on longitudinal direction Y on horizontal direction X of sheet 40.

Bodyside liner 20 such as can be formed by the plastic foil of the laminates of fiber matting, two or more fiber nonwoven web layer or perforation.When bodyside liner 20 is formed by fiber matting, described fiber matting can be such as the sticky adhesive-bonded fabric of hot blast method adhesive-bonded fabric, spunbond adhesive-bonded fabric or point, and described adhesive-bonded fabric has scope at about 15g/m ²to about 50g/m ²mass area ratio (that is, gross), more preferably, there is scope at about 20g/m ²to about 35g/m ²mass area ratio.The bodyside liner 20 exemplarily represented is 23g/m by mass area ratio ²point glue adhesive-bonded fabric formed, and, in such adhesive-bonded fabric, polypropylene fibre carried out in advance process to become hydrophilic.

Back sheet 22 can be formed by opaque liquid plastic foil, more preferably, by liquid-tight and moisture vapor transmission gas plastic foil formed.

Liner flange 40a can be formed by hydrophobic nonwoven fabric or opaque liquid plastic foil, and the liner flange 40a exemplarily illustrated is about 15g/m by mass area ratio ²the SMS adhesive-bonded fabric of polypropylene fibre is formed.Liner flange 40a is folded respectively to form sleeve, and multiple elastic component 36 is fixed in each sleeve by hot-melt adhesive (not shown) under the state of tensioning.As elastic component 36, the Spandex(TM by the fineness had in the scope of about 400dtex to about 1000dtex) with about 1.5 to be about 3 extensibility tensioning state under fixing.

Core 42 comprises the liquidabsorbing fibres and superabsorbent polymer granule that such as short fiber wood pulp cellulose is such.Core 42 is formed with rectangular depression 43(43R, 43L), described depression runs through this core 42 and extends (see Fig. 5 and 6) from its surperficial 42b in the face of skin to its non-surperficial 42c in the face of skin.Rectangular depression 43R, 43L are symmetrical about longitudinal centre line P-P, and extend on longitudinal direction Y.

In Figure 5, line V-V corresponds to binary for the size of diaper 10 on longitudinal direction Y cross central line Q-Q.

In the sheet 40 of Fig. 5, the surperficial 42b of skin faced by core 42 has and the non-surperficial 42c in the face of skin, wherein, among the surperficial 42b and the non-surperficial 42c in the face of skin of skin at least for the surperficial 42b of the skin in the face of wearer cover by bodyside liner 20, and, in the embodiment exemplarily represented, the non-surperficial 42c in the face of skin cover by back sheet 22.These two parts 20,22 are installed on core 42 by hot-melt adhesive (not shown).Should be appreciated that in this manual, in the face of the surface of skin sometimes referred to as the end face 42b of core 42, non-in the face of the surface of skin sometimes referred to as the bottom surface 42c of core 42.On the other hand, as seen in the diagram, the end face 42b of core 42 is formed with a pair rectangular depression 43(43L, 43R), these rectangular depressions 43 are configured to the form of the through hole sunk to bottom surface 42c from end face 42b, there is perisporium 43a, and extend on longitudinal direction Y.But these rectangular depressions 43 also can be arranged to the form of the groove respectively with relatively thin bottom.Each lateral margin 20a, 22a of bodyside liner 20 and back sheet 22 extend outwardly beyond the lateral margin of core 42, and utilize hot-melt adhesive (not shown) to be joined together.Liner flange 40a joins on the lateral margin 20a of the bodyside liner 20 and lateral margin 22a of back sheet 22 by hot-melt adhesive (not shown), further, the elastic component 36 on the inner surface of the lateral margin 40b of respective sleeve-shaped is fixed to comprise two states in tensioning in the lateral margin 40b of sleeve-shaped under.

With reference to Fig. 6, core 42 includes short fiber wood pulp cellulose as liquidabsorbing fibres 101 and superabsorbent polymer granule 102.Below should be appreciated that, liquidabsorbing fibres is sometimes referred to as short fiber wood pulp fibers 101.In core 42, end face 42b, bottom surface 42c and perisporium 43a are limited by surface layer 103,104,105 respectively, and these surface layers all or are substantially all formed by short fiber wood pulp cellulose 101.In other words, surface layer 103,104,105 is not or there is no superabsorbent polymer granule.Surrounded in each zone line (interior section) 106 of (or cover) by surface layer 103,104,105, short fiber wood pulp cellulose 101 and superabsorbent polymer granule 102 mutually admixed together with almost constant ratio.On the other hand, surface layer 103,104,105 also can include superabsorbent polymer granule 102, the difference of surface layer 103,104,105 and zone line 106 is, compared with in zone line 106, superabsorbent polymer granule 102 can be present in these surface layers relative to the ratio of liquidabsorbing fibres with much lower.In other words, the content of superabsorbent polymer granule 102 increases from surface layer 103,104,105 significantly to zone line 106.In Figure 5, indicate zone line 106, zone line 106 and surface layer 103,104,105 schematically to be differentiated.

Can utilize by (can from KOYOPRODUCKCo. by edible coloring agent " blue the No.1 "-Brilliant Blue FCF of 1% quality, Ltd. " the edible coloring agent of Yacht-labelling " that obtain) be dissolved in the normal saline solution of 0.9% the painted normal saline solution obtained, the content of the superabsorbent polymer granule visually in comparison sheet surface layer 103,104,105 and zone line 106.Prepare the test specimen for 5 cores 42 observed, and 30,60,90,120 and the painted normal saline solution of 150ml are dripped to each test specimen 42 with the speed of 10ml/sec directly over recess area, after the painted normal saline solution that drips 3 minutes, observe the colored state near the rectangular depression 43 in each test specimen 42.By in these 5 test pieces 42, drip painted normal saline solution thereon and demonstrated the test specimen exceeding its absorbability and get rid of, other four test specimens 42 are observed.In test specimen 42, the region comprising a large amount of superabsorbent polymer granules 102 is colored corresponding darker blueness, and the region including a large amount of short fiber wood pulp celluloses is painted to corresponding more shallow blueness.Like this, can know that the content of superabsorbent polymer granule is many or few.When only by observe from the outside of test specimen 42 be difficult to determine whether be in zone line blue time, test specimens 42 can be held with two handss, and break into two with one's hands along crossing over the imaginary line that rectangular depression 43 extends, the cross section of observation test specimen 42.In order to the operation of the painted normal saline solution that carries out dripping, preferably, the dropper with the capacity of at least 150ml is used.

In the figure 7, short fiber wood pulp 101 and superabsorbent polymer granule 102 is not indicated.The profile of core 42 make its be arranged in Attacking Midfielder's region 12 front part 42d and after being arranged in the width dimensions of the rear portion 42e of waist area 13 relatively large, and it is slightly little at the width dimensions of the mid portion 42f being arranged in crotch area 14, wherein, mid portion 42f is formed with a pair rectangular depression 43(43R, 43L).

Comprising in the sheet 40 shown in the Fig. 2 of the core 42 be formed as described above, such as urinating such body fluid by bodyside liner 20, then flowing into rectangular depression 43.Along with body fluid such as moves along each rectangular depression 43 on longitudinal direction Y, body fluid is disperseed, and is absorbed by surface layer 105 quilt core 42.Compared with not forming the core of rectangular depression 43, because the contact area between body fluid and core 42 is expanded effectively by each perisporium of rectangular depression 43, so the absorption of core 42 pairs of body fluid improves further.In addition, under the effect of capillarity, along perisporium 43a, in the surface layer 105 formed primarily of the fluff pulp wood fiber 101, body fluid can easily disperse on longitudinal direction Y and/or thickness direction.In surface layer 103,104, body fluid easily disperses on horizontal direction X and longitudinal direction Y.In sheet 40, core 42 can utilize its whole area to carry out the absorption of body fluid.

Even if when the surface layer 105 of perisporium 43a also plays when being out of shape due to the motion of the health of wearer by the core 42 through the diaper 10 on the health of wearer, the superabsorbent polymer granule 102 be included in mid portion 106 moves, superabsorbent polymer granule 102 also can be helped prevent to invade the effect rectangular depression 43 from zone line 106.Thus superabsorbent polymer granule 102 can invade in rectangular depression 43, block rectangular depression at least in part and the probability disturbing body fluid to flow smoothly along rectangular depression 43 is very low.

Surface layer 103,104,105 helps the function of body fluid-dispersible by this way, allows the core 42 including superabsorbent polymer granule 102 to be formed with the thickness thin like this from about 1mm to about 5mm.Superabsorbent polymer granule 102 does not have for the dispersion of body fluid the characteristic useful especially absorbing body fluid, and, when to wish on the whole area that body fluid is distributed to core 42 rapidly thus body fluid can quilt core 42 absorbs as quickly as possible time, the existence of superabsorbent polymer granule 102 or even very undesirable.But as seen in the embodiment exemplarily illustrated, core 42 includes surface layer 103,104,105, and these surface layers make core 42 can absorb body fluid rapidly.Be noted here that the present invention is not limited to the embodiment exemplarily illustrated.Particularly, when not exceeding scope of the present invention, the core 42 being formed with surface layer 105 and still not having any one surface layer in surface layer 103,104 or do not have these two surface layers can be used.The thickness of each surface layer 105 preferably in the scope of about 0.2mm to about 3mm, more preferably, in the scope of about 0.4mm to about 2mm.Although the one of preferred liquidabsorbing fibres is short fiber wood pulp cellulose, other liquidabsorbing fibres also can be utilized to replace short fiber wood pulp cellulose, such as, the short fiber of rayon fiber or this fiber mixed with short fiber wood pulp cellulose.The core 42 exemplarily illustrated can be replaced by the core wrapped up with suitable wrap sheets such as such as thin papers.The rectangular depression 43 of the form of rectangular depression of being arranged to of core 42, can be replaced by rectangular depression with the end, described rectangular depression with the end has the degree of depth extended to the non-surperficial 42c in the face of skin of core 4 in the face of the surperficial 42b of skin from core 4 respectively.

Exemplarily illustrate according to core 42 of the present invention, by suitably changing shape, the other factors such as number and position of its flat shape or cross sectional shape and/or such as groove, the body liquid absorptive core in various body fluid absorbent article such as such as Briefs for incontinence patients and menopad etc. can be used as

Now, with reference to accompanying drawing, the technique manufacturing this core 42 is exemplarily described.In figs. 8 and 9, MD represents machine direction, and CD represents orthogonal with machine direction MD (cross-section) direction that intersects, and HD represents the short transverse orthogonal with MD, CD direction.

Equipment 50 is provided with the forming part 51a of the core 42 being suitable for exemplarily representing in molded Fig. 4 and 7 and is suitable for utilizing the first conveyer belt 80 on machine direction MD, carry the delivery section 51b of molded core 42.Molding section 51a comprises: conduit 52; Be suitable for the first going barrel 63 rotated in the counter clockwise direction corresponding with MD direction around rotating shaft 63a; And the second going barrel 73 be suitable for around rotating shaft 73a rotation.

Conduit 52 is positioned at the top of the first going barrel 63, and by a pair perisporium 53a, 53b of subtend mutual on machine direction MD and on crisscross CD mutual subtend a pair perisporium 53c, 53d limit, wherein, the lower openings 52a of conduit 52 is in the face of the side face 65 of the first going barrel 63.Lower openings 52a extends along the side face 65 of the first going barrel 63, thus can keep predetermined gap between lower openings 52a and side face 65.In the perisporium of conduit 52 limiting lower openings 52a, on machine direction MD, perisporium 53a, 53b of described a pair of mutual subtend to be spaced from each other the size larger than the length dimension of the mould 66 that will describe below along the side face 65 of the first going barrel 63.

In conduit 52, be provided with and when machine direction MD observes, be positioned at the first movable spaced walls 54 of upstream side and when machine direction MD observes, be positioned at the second movable spaced walls 55 in downstream.These the first and second movable spaced walls 54,55 can be controlled, make respective far-end 54b, 55b can be centered around relevant pivot 54a, 55a of extension on the direction CD that reports to the leadship after accomplishing a task respectively and swinging by double-head arrow A, B indicated direction.Separated from perisporium 53a, 53b respectively by far-end 54b, 55b of swinging, make the first and second movable spaced walls 54,55 show posture for the formation of the core 42 with surface layer 103,104,105.On the contrary, kept in touch by far-end 54b, the 55b and perisporium 53a, 53b making swing, the first and second movable spaced walls 54,55 show the posture of the core 42 do not formed with surface layer 103,104,105.

By the first and second movable spaced walls 54,55 of the posture shown for the formation of the core 42 with surface layer 103,104,105, the first and second individual paths 56,57 are limited between perisporium 53a, 53b respectively at the first and second movable spaced walls 54,55 and conduit 52, further, between the first and second movable spaced walls 54,55, intermediate path 58 is limited.These paths extend from upstream side to downstream in conduit 52 on machine direction MD.First and second individual paths 56,57 and intermediate path 58 by perisporium 53c, the 53d(in the mutual subtend on the CD of direction of reporting to the leadship after accomplishing a task see Fig. 8) close from the side.

Conduit 52 is also formed with fiber supply port 59 and polymer beads feed line 60.Fiber supply port 59 is positioned at the top of conduit 52, plays a part feed fluid absorbency fiber 101 in conductive pipe 52.

Polymer beads feed line 60, for feeding superabsorbent polymer granule 102 in conductive pipe 52, comprises the outlet 60b being suitable for discharging superabsorbent polymer granule to the first going barrel 63.Export 60b in the below of fiber supply port 59 between the first and second movable spaced walls 54,55, to separate with the side face 65 of the first going barrel 63.

By the first and second movable spaced walls 54,55 of the posture shown for the formation of the core with surface layer 103,104,105, be dispersed in the first and second individual paths 56,57 and intermediate path 8 from process on the surface 65 dropping to the first going barrel 63 of the liquidabsorbing fibres 101 of fiber supply port 59 feeding.Superabsorbent polymer granule 102 is only fed via intermediate path 58, then, before being stacked on side face 65, preferably with uniform mixing ratio, mixes with liquidabsorbing fibres.

First going barrel 63 is configured to the form of the hollow cylinder limited by side surface 64a, 64b of subtend and side face 65.Side face 65 comprises multiple mould 66, and each mould inwardly concaves in the radial direction the first going barrel 63.These moulds 66 circumferentially configuring with predetermined pitch at the first going barrel 63.

Corresponding with the 3D shape of core 42, mould 66 comprises recessed region 67a and a pair protuberance 67b, described protuberance 67b limited by bottom 68 and wall 69a, 69b of holding up from bottom 68.Wall 69a limits the perisporium of recessed region 67a, and wall 69b limits the perisporium of protuberance 67b.These walls 69a, 69b can be tapered with suitable angle, to make core 42 can by easily from the demoulding mould 66.In wall 69a, 69b, at least wall 69b and bottom 68 are formed with multiple through hole 69c and multiple through hole 68c respectively, thus the inside and outside of the first going barrel 63 can be interconnected via these through holes 69c, 68c.In this embodiment of the present invention, also can be formed also with there is suitable internal diameter and with the wall 69a of through hole of the pitch of suitable rule configuration.

Referring again to Fig. 8 and 9, in the first going barrel 63, spaced walls 70a, 70b, 70c extend in radial directions from the side face of rotating shaft 63a.In the first area 71 limited by spaced walls 70a, 70b, the air being present in this intra-zone is extracted out from the first going barrel via the inside of rotating shaft 63a by the pump unit be interconnected with first area 71.In the second area 72 limited by spaced walls 70b, 70c, supply pressurized air stream 76 via the inside of rotating shaft 63a to second area 72 from the extraneous air feeding unit be interconnected with second area 72.In the rotary course of the first going barrel 63, when the mould 66 on the side face 65 being formed in the first going barrel 63 is mobile in first area 71, be present in through hole 68c, the 69c(via each mould 66 of the air stream 75 in the recessed region 66 of each mould 66 see Figure 10 (a) and 10(b)) be sucked, thus swabbing pressure is applied each recessed region 67a.In the rotary course of the first going barrel 63, when the mould 66 on the side face 65 being formed in the first going barrel 63 moves in second area 72, pressurized air 76 is discharged by second area 72, and discharges to the recessed region 67a of mould 66 from this via through hole 68c, 69c.

Second going barrel 73 has cylindricality side face 74, and this cylindricality side face 74 is formed with the multiple pore (not shown) be interconnected with the inside of the second going barrel 73.In the second going barrel 73, spaced walls 75a, 75b, 75c extend in radial directions from the side face of rotating shaft 73a.Across the second area 72 of side face 74 in the face of the first going barrel 63 in the middle of the first area 77 that limited by spaced walls 75a, 75b in the second going barrel 73, make to be present in the air in first area 77 and aspirated by the external suction unit (not shown) be interconnected with first area 77 via the inside of rotating shaft 73a.In the middle of the second area 78 of the second going barrel 73 limited by spaced walls 75b, 75c across side face 74 in the face of the first conveyer belt 80.In second area 78, pressurized air is externally discharged from the second going barrel 73 by the extraneous air feeding unit (not shown) be interconnected with second area 78 via the inside of rotating shaft 73a.First going barrel 63 and the second going barrel 73 are cooperated, make in the rotary course of the first going barrel 63, when the core 42 be molded by the mould 66 on the side face of the first going barrel 63 is when the side face 74 of the second going barrel 73, swabbing pressure by extend through the stomatal action of the side face 74 of the second going barrel 73 on core 42, and thus core 42 is transferred on the side face 74 of the second going barrel 73 by the side face 65 from the first going barrel 63.When side face 74 moves to the second area 78 of the second going barrel 73, the air stream of the pressurization of supplying via second area 78 is discharged to core 42 by the pore via side face 74, and thus, core 42 is transferred on the first conveyer belt 80 by from side face 74.

First conveyer belt 80 is air-by type, and cooperates with driven roller 81 and driven voller 82, is moved along by the track that these drive and driven voller 81,82 limits.This first conveyer belt 80 is formed with multiple through hole (not shown).Between driven roller 81 and driven voller 82, be equipped with the suction box 84 of proper number, described suction box 84 is for aspirating the air be present in above the first conveyer belt 80.Suction box 84 can be started, to be fixed on the first conveyer belt 80 by core 42.Across the second area 78 of the side face 74 of the second going barrel in the face of the second going barrel in the middle of first conveyer belt 80.

In the downstream of the first conveyer belt 80, supply is all coated with first band 91 corresponding to continuous print bodyside liner 20 of hot-melt adhesive and corresponds to the second band 92 of continuous print back sheet 22, to configure core 42, and thus form the composite strip 94 forming core 42, first band 91 and the second band 92.Composite sheet 94 is loaded onto on the second conveyer belt 93, and is carried further on machine direction MD.In subsequent steps, a pair band corresponding respectively to the continuous print liner flange 40a do not cut off is installed on composite strip 94, to form the composite strip (not shown) corresponding to the continuous print sheet 40 do not cut off, and finally the composite strip 94 of the continuous print sheet 40 do not cut off is cut off, to obtain independently sheet 40 along the line limited between often pair of adjacent core 42.Although the technique exemplarily illustrated can draw together the step of sheet 40 being carried out to pressure processing, for convenience of explanation, eliminate the explanation to this pressure processing step.

Can by the first movable spaced walls and/or the second movable spaced walls 55 being pivoted into the posture that can form at least surface layer 104 in surface layer 103,104,105 and surface layer 105, the operation of beginning equipment 50.

Then, the inside feeding of conductive pipe 52 is used as short fiber wood pulp cellulose 101 and the superabsorbent polymer granule 102 of liquidabsorbing fibres.Meanwhile, rotate the first and second going barrels 63,69 and start the first conveyer belt 80 and make it to advance.

The upstream side region of the conduit 52 when observing from machine direction MD, is only fed into the first individual path 56 by short fiber wood pulp cellulose 101.Short fiber wood pulp cellulose 101 by the first individual path 56 is entered to be fed to be formed in the mould 66 on the side face 65 in first area 71.At through hole 68c, the 69c(via the bottom 68 and wall 69b that extend through each mould 66 see Figure 10 (c)) under the swabbing action that applies, short fiber wood pulp cellulose 101 to be stacked into bottom each 68 and wall 69b surface on.When mould 66 is formed with through hole 69c on its wall 69a, short fiber wood pulp cellulose is also stacked on wall 69a.As for a pair protuberance 67b be formed on each mould 66, various alternative embodiment can be considered.Such as, paired protuberance 67b partly can be formed through 69c, or only in paired protuberance 67b one protuberance is formed with through hole 69c.

When the rotation along with the first going barrel 63, when mould 66 is just in time come immediately below intermediate path 58, short fiber wood pulp cellulose 101 and superabsorbent polymer granule 102 are stacked in each mould 66 under the state of mixing.

In the technique exemplarily illustrated, after predetermined short fiber wood pulp cellulose has been stacked on the bottom 68 of each mould 66 and wall 69b, superabsorbent polymer granule 102 can be supplied to mould 66, be covered by suitable short fiber wood pulp cellulose breathability to guarantee to extend through the through hole 68c of bottom 68 and wall 69b and through hole 69c.Thus, superabsorbent polymer granule 102 can be avoided to invade in through hole 68c and through hole 69c and final problem of blocking these through holes 68c, 69c.

In Figure 11 to Figure 14, describe the core according to another embodiment of the present invention.

With reference to Figure 11, core 42 comprises non-the first sandwich layer 11 on the surface of skin and the second sandwich layer 112 on the surface of skin being positioned at sheet 40 that are positioned at sheet 40.First sandwich layer 111 comprises the 100g/m that has an appointment ²to about 500g/m ²the short fiber wood pulp cellulose 101 of ratio ranges and about 20g/m ²to about 500g/m ²the superabsorbent polymer granule of ratio ranges.First sandwich layer 111 has the flat shape different slightly from the flat shape of the core 42 in Fig. 7, and centrage P-P is formed with the rectangular depression 143 of through-hole form along the longitudinal.Second sandwich layer 112 comprises the 100g/m that has an appointment ²to about 500g/m ²the short fiber wood pulp cellulose 101 of ratio ranges and 0g/m ²to about 500g/m ²the superabsorbent polymer granule 102 of ratio ranges.The length dimension of the second sandwich layer 112 on longitudinal direction Y is shorter than the corresponding size of the first sandwich layer 111.At crotch area 14(see Fig. 2), the width dimensions of the second sandwich layer 112 is greater than the corresponding width dimensions of the first sandwich layer 111.First sandwich layer 111 along the longitudinal centrage P-P is formed with rectangular depression 143, and described rectangular depression 143 sinks between the end face 111b contacted with the second sandwich layer 112 and the bottom surface 111c contacted with back sheet 22.But the form that rectangular depression 143 can all have the groove of relatively thin bottom with each is arranged.Second sandwich layer 112 has the end face 112b and bottom surface 112c that are not formed with rectangular depression.First sandwich layer 111 is also formed with surface layer 104a, 105a respectively on the perisporium 143a of bottom surface 111c and rectangular depression 143, leaves remaining part and limits interior section 106a.Second sandwich layer 112 is only formed with surface layer 104b on the 112c of bottom surface.With the surface layer 104 in Fig. 6,105 similar, these surface layers 104a, 105a only by or formed primarily of the short fiber wood pulp cellulose being used as liquidabsorbing fibres.These surface layers are used as to stop the barrier that may invade the superabsorbent polymer granule in rectangular depression 143 from interior section 106.The surface layer 104b of the second sandwich layer 112 is used as stop may from the second sandwich layer 112 to the barrier of the superabsorbent polymer of the first core 111 movement.In the core 42 shown in Figure 11, in the first sandwich layer 111, following form is provided with the rectangular depression 143 for helping body fluid-dispersible, that is, when observing from thickness direction, the upper opening of rectangular depression 143 is closed by the surface layer 104b of the second sandwich layer 112.

In the sheet 40 shown in the Figure 12 and 13 of the core 42 included shown in Figure 11, back sheet 22 is provided with the multiple middle spring component 61 extending across rectangular depression 143 in a longitudinal direction on its outer surface.Specifically, these middle spring components 61 are arranged between back sheet 22 and elastic component emulsion sheet 62, and at least one sheet utilizing hot-melt adhesive (not shown) to be fixed under the state of Y tensioning in a longitudinal direction in these sheets 22,62.Elastic component emulsion sheet 62 can be formed by adhesive-bonded fabric or plastic foil.

Figure 14 is the figure being similar to Figure 13, exemplarily represents the mode that the sheet 40 shown in Fig. 3 is out of shape.For the diaper 10 in wearer's body, assuming that be not the sheet shown in Fig. 2 but the sheet 40 shown in Figure 12 and 13 is installed in substrate 11, elastic component 61 flexibly will be extended on longitudinal direction Y, make sheet along the limited region of elastic component 61 near the crotch area of wearer or contact with the crotch area of wearer.In addition, the elastic component for liner flange 40a is also stretched at longitudinal direction Y or in the circumferential direction of the leg of wearer, make the lateral edges 40b of each liner flange 40a and the lower limb of wearer or inguinal region close to or contact.In this case, the cross sectional shape of sheet 40 intercepted along cross central line Q-Q is deformed into the W shape exemplarily represented close to such as Figure 14, wherein, elastic component 61 and elastic component 36 produce crest, and the pars intermedia extended between elastic component 61,36 limits trough.This diaper 10 designed uniquely makes sheet 40 be out of shape by this way under the effect of elastic component 61, thus, make the crotch area of sheet 40 and wearer close to or contact, be particularly suitable for suffering from the patient of the incontinence of moderate or moderate.In other words, this diaper 10 has useful effect for the usual absorption with relatively a small amount of urine of low speed discharge.The basic role feature being formed in the rectangular depression 143 in the first sandwich layer 111 is similar to the dispersion mode described by the rectangular depression 43 exemplarily represented in Fig. 4 to Fig. 6 being helped to body fluid, in addition, also with elastic component 61 co-operating, to promote that core 42 is deformed into inverted V-shaped around longitudinal centre line P-P, thus contribute to sheet 40 and be integrally deformed into W shape.Unique size is made in the crotch area 14 of core 42, the width dimensions of the first sandwich layer 111 is made to be less than the width dimensions of the second sandwich layer 112, to make ladder in the upper thickness limit of core 42, core 42 can be bent easily along this ladder, thus is easily deformed into W shape.Here, should be appreciated that the core 42 shown in Figure 11 can not be implemented in combination with elastic component 61, that is, only use core 42 individually.

Figure 15 is the figure being similar to Fig. 8, and a part for the technique of the core 42 for the manufacture of Figure 11 is described, wherein, first and second equipment 50a, 50b represent in the mode of broken section.Technique shown in Figure 15, except relating to first and second equipment 50a, 50b, also relates to the first and second conveyer belts 80,93 and the supplying means for the first band 91 and the second band 92.First and second equipment 50a, 50b, the first and second conveyer belts 80,93 and the supplying means for the first band 91 and the second band 92, be similar to equipment 50, first and second conveyer belt 80,93 in Fig. 8 and 9 and the supplying means for the first band 91 and the second band 92 substantially respectively.Second equipment 50b corresponds to the scaled down version of the first equipment 50a, there is substantially identical with it structure, except the first sandwich layer 111 of the technique SMIS 42 at Figure 15 is formed by the first equipment 50a, outside the second sandwich layer 112 is formed by the second equipment 50b, substantially with the first equipment 50a is identical.In order to make it to become possibility, first equipment 50a comprises mould 66, each mould 66 has and the structure corresponding with in the first sandwich layer 111 of rectangular depression 143 that will describe below respectively, second equipment 50b comprises mould 166, and each mould 166 has and the structure corresponding with in the second sandwich layer 112 of rectangular depression 243 that will describe below respectively.In the conduit 52 of the first equipment 50a, first movable spaced walls 54 keeps separating with the perisporium 53a of conduit 52, thus, while the second movable spaced walls 55 keeps contacting with the perisporium 53b of conduit 52, the first individual path is kept to open, and thus the second individual path keeps closing, so that the first sandwich layer 111 can be formed with surface layer 104a, 105a(see Figure 13).In the second equipment 52b, while the second movable spaced walls 155 keeps contacting with the perisporium 153b of conduit 152, the first movable spaced walls 154 keeps separating, so that the second sandwich layer 112 can be formed with surface layer 104b with the perisporium 153a of conduit 152.The first sandwich layer 111 utilizing the first equipment 50a to be formed and the second sandwich layer 112 utilizing the second equipment 50b to be formed overlie one another, to form core 42.Process core 42 further, to form composite strip, this composite strip is carried by the downstream to machine direction MD.In the step in downstream, the band of liner flange 40a, elastic component 61 and elastic component emulsion sheet 62 are installed on composite strip.For convenience of explanation, these steps are not indicated.Although the technique of Figure 15 can comprise the step of core 42 being carried out to pressure processing in the suitable stage, for convenience of explanation, do not indicate this step.

Figure 16 is the figure being similar to Fig. 7, exemplarily represents another embodiment of core 42, and Figure 17 is the sectional view intercepted along the line XVII-XVII of Figure 16.The core 42 of Figure 16 comprises the first sandwich layer 111 and the second sandwich layer 112 overlie one another.Although with regard to formation and size, first and second sandwich layers 111,112 do not have difference each other, but the first sandwich layer 111 limiting the lower floor in knockout 42 in a longitudinal direction centrage P-P is formed with the rectangular depression 143 of a pair of being separated from each other out on longitudinal direction Y.The second sandwich layer 112 limiting the upper strata of knockout 42 is formed with rectangular depression 243 respectively near corner.In the first sandwich layer 111, each perisporium 143a of end face 111b and rectangular depression 143 is formed with surface layer 103a, 105a of forming primarily of the liquidabsorbing fibres (not shown) piled up thereon respectively.In the second sandwich layer 112, the perisporium of bottom surface 112c and each rectangular depression 243 is formed with surface layer 204a, 205a of forming primarily of the liquidabsorbing fibres (not shown) piled up thereon.The rectangular depression 143 of this core 42 corresponds to a kind of variation of the rectangular depression that will be formed in core 42, play a part the body fluid that promotes to flow into its inside in a longitudinal direction Y flow and disperse useful, play a part promotion perisporium 143a absorption body fluid simultaneously.In addition, rectangular depression 143 plays a part to be suitable for prevent the superabsorbent polymer granule (not shown) be included in interior section 106a, 106b from invading barrier in rectangular depression 143,243.And then, these rectangular depressions 143 contribute to sheet 40 with the second sandwich layer 112 towards outer mode along the longitudinal centrage P-P be bent to inverted V-shaped, thus contribute to making the crotch area of the region of the P-P of centrage along the longitudinal of sheet 40 and diaper wearer close to or contact.Rectangular depression 243 is also formed in a kind of form of the rectangular depression in core 42, not only plays a part the absorption and the dispersion that promote body fluid, and contributes to the bight distortion of sheet 40.But rectangular depression 243 also can be configured to the form that each all has the groove of relatively thin bottom.Thus the skin of wearer cosily can be oppressed in these bights.

Figure 18 is the figure being similar to Fig. 7, exemplarily represents another embodiment again of core 42, and Figure 19 is the sectional view intercepted along the XIX-XIX line of Figure 18.Core 42 shown in Figure 18 and 19 comprises first, second, and third sandwich layer 111,112,113, and these core shape and size are consistent, and overlie one another together.Second sandwich layer 112 is sandwiched in first and the 3rd between sandwich layer 111,113, and centrage P-P is formed with rectangular depression 243 along the longitudinal, and described rectangular depression 243 is relatively long on longitudinal direction Y.First sandwich layer 111 is formed with the surface layer 103a consisting predominantly of accumulation liquidabsorbing fibres (not shown) thereon at its end face.Second sandwich layer 112 is formed with at the perisporium 243a of its bottom surface and rectangular depression 243 surface layer 104b, 105b of consisting predominantly of accumulation liquidabsorbing fibres (not shown) thereon.3rd sandwich layer 113 is formed with the surface layer 104c consisting predominantly of accumulation liquidabsorbing fibres (not shown) thereon in its bottom surface.These surface layers 103a, 104b, 105b, 104c also play and not only prevent the superabsorbent polymer granule (not shown) be included in each interior section 106a, 106b, 106c from invading in rectangular depression 243, but also help the dispersion of body fluid in rectangular depression 243 and the useful effect of absorption.Rectangular depression 243 contribute to sheet 40 along the longitudinal centrage P-P be deformed into inverted v-shaped.

This core 42 can comprise the first and second sandwich layers 111,112, second sandwich layer 112 can be formed with the rectangular depression 243 of through-hole form, 3rd sandwich layer 113 can be stacked on the second sandwich layer 112, and the short fiber wood pulp cellulose making the upper opening of the rectangular depression of the upper surface being formed at the second sandwich layer 112 can be formed the 3rd sandwich layer 113 is closed.

Figure 11 to 18 exemplarily represent according to core 42 of the present invention, by suitably changing the structure of its shape, thickness or rectangular depression 43 or 243, the body liquid absorptive core in various body fluid absorbent article such as such as incontinent brief and menopad etc. can be used as.

First aspect of the present invention recited above at least can arrange as item described below:

(i) a body fluid absorbent article, comprising:

Body liquid absorptive core, described body liquid absorptive core has predetermined thickness, and the inside of described body liquid absorptive core includes liquidabsorbing fibres and superabsorbent polymer granule; And

Liquid-permeable sheet, described liquid-permeable sheet covers the upper surface of described core.

In body fluid absorbent article, described core has in the face of the surface of skin and the non-surface in the face of skin contrary with in the face of the surface of skin;

In the face of the surface of skin and non-at least one surface in the surface of skin are formed with one or more rectangular depression, described rectangular depression sinks to from the face of the surface of skin to the non-surface in the face of skin; And

Described core comprises: one or more surface layer formed by liquidabsorbing fibres respectively, so that the perisporium limiting one or more rectangular depression; And interior section, described interior section is positioned at the inner side of one or more surface layer, and is formed by the liquidabsorbing fibres mixed and superabsorbent polymer granule.

This first aspect can comprise one or more embodiment described below.

(ii) one or more rectangular depression is configured to the form of the through hole extended to the non-surface in the face of skin from the surface in the face of skin.

(iii) one or more rectangular depression is configured to the form that each all has the groove of bottom.

(iv) described core has mutually orthogonal longitudinal direction and horizontal direction;

When observing in a lateral direction, described core is formed with one or more rectangular depression described therebetween;

The non-surface in the face of skin of described core is covered by opaque liquid sheet; And

Opaque liquid sheet is provided with elastic component, and described elastic component and one or more rectangular depression described extend abreast, and described elastic component is fixed on described opaque liquid sheet under the state of tensioning.

(v) described core comprises multiple sandwich layer, and described sandwich layer is mutually stacking;

Any one in these sandwich layers is all formed with one or more rectangular depression;

At least one in described rectangular depression has respective opening on the thickness direction of core; And

Described opening is closed by liquidabsorbing fibres, and described liquidabsorbing fibres is included in by the sandwich layer that is directly stacked on the sandwich layer being formed with one or more rectangular depression.

(vi) each sandwich layer zone line of having surface layer respectively and being surrounded by surface layer, wherein, compared with zone line, surface layer comprises short fiber wood pulp cellulose with the ratio higher than superabsorbent polymer granule.

A second aspect of the present invention at least can arrange as item described below:

(vii) for the manufacture of the method for the body liquid absorptive core in body fluid absorbent article, wherein;

Technique for the manufacture of described core comprises the step to each mould feed fluid absorbency fiber, and described mould has the recessed region of the 3D shape corresponding to described core respectively, and wherein, the female region limited by bottom and the perisporium holded up from bottom;

Each perisporium of described mould is formed with multiple through hole at least in part, and one or more the female region can be subject to swabbing action via described through hole; And

In the step of feeding fiber, under the swabbing action provided via through hole, each surface of described perisporium is covered by liquidabsorbing fibres at least in part.

Second aspect of the present invention can at least comprise following embodiment:

(viii) be also formed with multiple through hole bottom each of described mould, can swabbing action be provided via these through holes; And

Described technique comprises first step, at described first step, under the swabbing action provided via described through hole, is covered bottom and the perisporium of each mould by liquidabsorbing fibres at least in part; And second step, after described first step, at described second step, liquidabsorbing fibres and superabsorbent polymer granule are fed into each recessed region of described mould.

(i) of the present invention in one or more to what describe in (viii) in above-mentioned item, one or more useful effect described below can be provided.

Limit the surface layer of the perisporium of one or more rectangular depression of the body liquid absorptive core for article, form primarily of liquidabsorbing fibres.By the feature of this uniqueness, for these surface layers, can prevent the superabsorbent polymer granule be included in interior zone from moving in described core and invade in rectangular depression, at this place, superabsorbent polymer granule may absorb body fluid and form gel piece in the depression that one or more is rectangular.Like this, for this body liquid absorptive core, body fluid can be absorbed by the perisporium of one or more rectangular depression.

This application claims the priority of Japanese publication No.2010-294192, it is all open by reference to being combined in here.Although the preferred form of the particularity had to a certain degree with it describes the present invention, but, be to be understood that, the disclosure of preferred form, when not exceeding the spirit and scope of the present invention, can carry out the change of the change of the details of structure and the combination of parts and configuration, scope of the present invention is defined by the claims.

Claims

1. a body fluid absorbent article, has mutually orthogonal horizontal direction and longitudinal direction and by binary for the size of described horizontal direction longitudinal centre line, and, comprising:

Liquid-permeable sheet, described liquid-permeable sheet covers the upper surface of described body liquid absorptive core, wherein,

Described body liquid absorptive core has in the face of the surface of skin and the non-surface in the face of skin contrary with the described surface in the face of skin;

The described surface in the face of skin and described non-at least one surface in the surface of skin are formed with one or more rectangular depression, and described rectangular depression sinks to the described non-surface in the face of skin from described in the face of the surface of skin; And

Described body liquid absorptive core comprises each one or more surface layer formed by liquidabsorbing fibres, for limiting the perisporium of depression rectangular described in one or more, and comprise interior section, described interior section is positioned at the inner side of surface layer described in one or more and is formed by liquidabsorbing fibres admixed together and superabsorbent polymer granule

Described body liquid absorptive core is formed by multiple sandwich layer overlie one another,

Configure the first sandwich layer in the described non-face side in the face of skin, configure the second sandwich layer in the described face side in the face of skin,

Described first sandwich layer and described second sandwich layer are formed with described depression respectively,

The described depression of described first sandwich layer configures two with the form of longitudinal arrangement on described longitudinal centre line,

The described depression of described second sandwich layer is configured in four bights of described second sandwich layer respectively.

2. body fluid absorbent article as claimed in claim 1, is characterized in that, depression rectangular described in one or more is configured to the form from the described through hole extended to the described non-surface in the face of skin in the face of the surface of skin.

3. body fluid absorbent article as claimed in claim 1, is characterized in that, depression rectangular described in one or more is configured to the form that each all has the groove of bottom.

4. body fluid absorbent article as claimed in claim 1, is characterized in that,

The thickness direction being recessed in described body liquid absorptive core rectangular described at least one has respective opening; And

Described opening is comprised in be closed by the liquidabsorbing fibres in the sandwich layer that is directly stacked on the described sandwich layer being formed with or described multiple rectangular depression.

5. body fluid absorbent article as claimed in claim 1, it is characterized in that, the zone line that sandwich layer described in each all has surface layer and surrounded by described surface layer, wherein, compared with described zone line, described surface layer includes the short fiber wood pulp of the ratio higher than superabsorbent polymer granule.